Figure 2. a) and b) NMR images of the Apis mellifera brain. Both images are slices of a three-dimensional dataset with a nominal resolution of 15.6 x 15.6 x 30.0 µm3. Slice b) is located posterior to slice a). Images c) and d) show the corresponding segmentation masks, all manually segmented structures are shown in dark grey. The brain structures visible in the images are: antennal lobe (1, green in Figure 1), lateral (2, red) and median (3, red) calyx, peduncle and -lobe (4, light red), -lobe (5, light red), lobula (6, yellow), medulla (7, yellow). The other marked structures are the median (8, grey) and lateral (9, pink) ocelli and the compound eyes (10, brown).